How to represent a large decision tree?
The question is: how to represent that data in a human-readable way, that emphasizes the flow of the graph?


Train a reasoning engine to understand the decision tree for you.

Observe how IBM Watson/The Debater can 


Receive a particular question
Find and read Wikipedia articles related to the question
Understand parts of those articles and generate human-relevant arguments for you.


Follow these steps:


Develop your decision tree however you normally would.
Train a reasoning engine that can output natural language about concepts within decision trees.
Apply reason engine from step one to decision tree in step one; repeat.